For christmas this year I had gotten my cousin a yin yang necklace. I have the white part (yang) 
and she has the black part (yin). I don't really know what all of it meant. So what does this chinese symbol mean? After looking it up on the internet. The colors of the symbol were self explanatory by the black and white. black meaning night, restful, peace, and more feminine. White means  day, energenic, and  masculine. I read a really good article about it. And it helped me to understand what the yinyang symbol meant to people.  I really do recommend you reading this article it has some interesting facts about yinyang symbol and where it has came from >  http://www.leisure.food-recipe-cooking.com/yin-yang-meaning-and-relevance-fcr-01.htm